Takahashi Rumiko Gekijou Ningyo no Mori EP13 - Mermaid's Scar (Part II)

Masato reveals to his captive Mana that he is going to kill Yuta. Masato returns to the house, where he tricks Yuta into being caught in a booby trap of piano wire which cuts deeply into his neck. Masato explains that he is over 800 years old and recounts how he used mermaid flesh to transform many women into becoming long-lived mothers to him, but they all eventually died. Mana escapes her bonds and arrives to save Yuta just as Masato is in the process of beheading him with an ax. Masato shoots Mana, who as he dies, promises to kill Masato if he shoots Yuta, however she collapses first. Masato sets fire to the house to kill Mana, however, she awakes in time to drag Yuta's corpse from the fire. Masato drives off in his mother's car, but loses control. As a head-on collision with a truck is imminent, he resolves to find his next companion after he comes back to life. Yuta eventually revives and finds Mana crying. Later, he ask Mana why she cried and she replies that it was out of happiness.